import './waves.css'

export default {
	bind(el, binding) {
		el.addEventListener('click', e => {
			const customOpts = Object.assign({}, binding.value)
			const opts = Object.assign({
				ele: el, // 波纹作用元素
				type: 'hit', // hit点击位置扩散center中心点扩展
				color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
			}, customOpts)
			const target = opts.ele
			if (target) {
				target.style.position = 'relative'
				target.style.overflow = 'hidden'
				const rect = target.getBoundingClientRect()
				let ripple = target.querySelector('.waves-ripple')
				if (!ripple) {
					ripple = document.createElement('span')
					ripple.className = 'waves-ripple'
					ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px'
					target.appendChild(ripple)
				} else {
					ripple.className = 'waves-ripple'
				}
				switch (opts.type) {
					case 'center':
						ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px'
						ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px'
						break
					default:
						ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px'
						ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px'
				}
				ripple.style.backgroundColor = opts.color
				ripple.className = 'waves-ripple z-active'
				return false
			}
		}, false)
	}
}

